Test RGBLINK on SDCC object files (#1479)

test/link/sdcc/no-script/a.asm

@@ -0,0 +1,12 @@
+SECTION "entry", ROM0[$0100]
+	jp start
+
+SECTION "header", ROM0[$0104]
+	ds $150 - $104, 0
+
+SECTION "start", ROM0
+start:
+	ld de, 1234
+	call _function ; de <- 1234 * 2
+	ld b, b        ; breakpoint
+	stop

test/link/sdcc/no-script/b.c

@@ -0,0 +1,5 @@
+// sdcc -c -msm83 -o b.rel b.c
+
+int function(int de) {
+	return de * 2;
+}

test/link/sdcc/no-script/b.rel

@@ -0,0 +1,19 @@
+XL3
+H 9 areas 2 global symbols
+M b
+O -msm83
+S .__.ABS. Def000000
+A _CODE size 6 flags 0 addr 0
+S _function Def000000
+A _DATA size 0 flags 0 addr 0
+A _INITIALIZED size 0 flags 0 addr 0
+A _DABS size 0 flags 8 addr 0
+A _HOME size 0 flags 0 addr 0
+A _GSINIT size 0 flags 0 addr 0
+A _GSFINAL size 0 flags 0 addr 0
+A _INITIALIZER size 0 flags 0 addr 0
+A _CABS size 0 flags 8 addr 0
+T 00 00 00
+R 00 00 00 00
+T 00 00 00 6B 62 29 4D 44 C9
+R 00 00 00 00

test/link/sdcc/no-script/out.err

@@ -0,0 +1,8 @@
+error: Section "_INITIALIZER" has not been assigned a type by a linker script
+error: Section "_GSFINAL" has not been assigned a type by a linker script
+error: Section "_GSINIT" has not been assigned a type by a linker script
+error: Section "_HOME" has not been assigned a type by a linker script
+error: Section "_INITIALIZED" has not been assigned a type by a linker script
+error: Section "_DATA" has not been assigned a type by a linker script
+error: Section "_CODE" has not been assigned a type by a linker script
+Linking failed with 7 errors