Add several tests for linker script syntax

Fixes a slice of #1276

test/link/script-different-bank.link

@@ -0,0 +1,2 @@
+romx 2
+	"ROM1"

test/link/script-different-bank.out

@@ -0,0 +1,2 @@
+error: script-different-bank.link(2): The linker script places section "ROM1" in ROMX bank 2, but it was already defined in bank 1
+Linking failed with 1 error

test/link/script-different-type.link

@@ -0,0 +1,2 @@
+sram 1
+	"ROM1"

test/link/script-different-type.out

@@ -0,0 +1,2 @@
+error: script-different-type.link(2): "ROM1" is specified to be a SRAM section, but it is already a ROMX section
+Linking failed with 1 error

test/link/script-lone-dollar.link

@@ -0,0 +1 @@
+vram $

test/link/script-lone-dollar.out

@@ -0,0 +1,2 @@
+error: script-lone-dollar.link(1): No hexadecimal digits found after '$'
+Linking failed with 1 error

test/link/script-lone-percent.link

@@ -0,0 +1 @@
+vram %

test/link/script-lone-percent.out

@@ -0,0 +1,2 @@
+error: script-lone-percent.link(1): No binary digits found after '%'
+Linking failed with 1 error

test/link/script-missing-bank-no.link

@@ -0,0 +1,8 @@
+rom0
+romx
+vram
+sram
+wram0
+wramx
+oam
+hram

test/link/script-missing-bank-no.out

@@ -0,0 +1,5 @@
+error: script-missing-bank-no.link(2): A bank number must be specified for ROMX
+error: script-missing-bank-no.link(3): A bank number must be specified for VRAM
+error: script-missing-bank-no.link(4): A bank number must be specified for SRAM
+error: script-missing-bank-no.link(6): A bank number must be specified for WRAMX
+Linking failed with 4 errors

test/link/script-num-fmt.link

@@ -0,0 +1,5 @@
+ROM0
+	org 42
+	org %101010
+	org $2A
+	org 41 ; Error!

test/link/script-num-fmt.out

@@ -0,0 +1,2 @@
+error: script-num-fmt.link(5): Cannot decrease the current address (from $002a to $0029)
+Linking failed with 1 error

test/link/script-oob-bank-num.link

@@ -0,0 +1,8 @@
+rom0 1
+romx 0
+vram 2
+wram0 1
+wramx 0
+wramx 8
+oam 1
+hram 1

test/link/script-oob-bank-num.out

@@ -0,0 +1,9 @@
+error: script-oob-bank-num.link(1): ROM0 bank 1 doesn't exist (the maximum is 0)
+error: script-oob-bank-num.link(2): ROMX bank 0 doesn't exist (the minimum is 1)
+error: script-oob-bank-num.link(3): VRAM bank 2 doesn't exist (the maximum is 1)
+error: script-oob-bank-num.link(4): WRAM0 bank 1 doesn't exist (the maximum is 0)
+error: script-oob-bank-num.link(5): WRAMX bank 0 doesn't exist (the minimum is 1)
+error: script-oob-bank-num.link(6): WRAMX bank 8 doesn't exist (the maximum is 7)
+error: script-oob-bank-num.link(7): OAM bank 1 doesn't exist (the maximum is 0)
+error: script-oob-bank-num.link(8): HRAM bank 1 doesn't exist (the maximum is 0)
+Linking failed with 8 errors

test/link/script-unk-keyword.link

@@ -0,0 +1 @@
+bonjour

test/link/script-unk-keyword.out

@@ -0,0 +1,2 @@
+error: script-unk-keyword.link(1): Unknown keyword "bonjour"
+Linking failed with 1 error

test/link/script-unknown-section.link

@@ -0,0 +1,2 @@
+rom0
+	"Wheeee"

test/link/script-unknown-section.out

@@ -0,0 +1,2 @@
+error: script-unknown-section.link(2): Unknown section "Wheeee"
+Linking failed with 1 error

test/link/script-unterminated-string.link

@@ -0,0 +1,2 @@
+rom0
+	"ROM0

test/link/script-unterminated-string.out

@@ -0,0 +1,2 @@
+error: script-unterminated-string.link(2): Unterminated string
+Linking failed with 1 error

test/link/script.asm

@@ -0,0 +1,5 @@
+; script*.link are tests for the linker script.
+; So there isn't much to see here.
+
+SECTION "ROM0", ROM0
+SECTION "ROM1", ROMX,BANK[1]