Remove duplicate linker script definitions

## Summary
A lot of linker scripts were listed twice, once for unix, once for windows.

This PR cleans up the logic so they're only listed once.

 ## Impact
Any opportunity to use a single source of truth and reduce lines of code is a win!

 ## Testing
CI will test all build

boards/x86/qemu/qemu-i486/scripts/Make.defs

@@ -30,12 +30,11 @@ ifneq ($(CONFIG_DEBUG_NOOPT),y)
 endif
 
 ifeq ($(CONFIG_CYGWIN_WINTOOL),y)
-  ARCHSCRIPT = -T "${shell cygpath -w $(BOARD_DIR)$(DELIM)scripts$(DELIM)qemu.ld}"
   MAXOPTIMIZATION = -O2
-else
-  ARCHSCRIPT = -T$(BOARD_DIR)$(DELIM)scripts$(DELIM)qemu.ld
 endif
 
+ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)qemu.ld
+
 ARCHCPUFLAGS = -march=i486 -mtune=i486 -fno-builtin -fno-stack-protector
 ARCHPICFLAGS = -fpic
 ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef