Add -Wa,-xgot to C{XX}FLAGS when building layout on Linux/mips{sel}

Bug #93711 r=bryner

config/rules.mk

@@ -410,6 +410,15 @@ endif
 endif
 endif
 
+ifeq ($(OS_ARCH),Linux)
+ifneq (,$(filter mips mipsel,$(OS_TEST)))
+ifeq ($(MODULE),layout)
+OS_CFLAGS += -Wa,-xgot
+OS_CXXFLAGS += -Wa,-xgot
+endif
+endif
+endif
+
 #
 # HP-UXBeOS specific section: for COMPONENTS only, add -Bsymbolic flag
 # which uses internal symbols first