initramfs: Fix build break on symbol-prefixed archs

Signed-off-by: Mike Frysinger <[email protected]>
Signed-off-by: Michal Marek <[email protected]>

Author: Mike Frysinger

scripts/Makefile.lib

@@ -128,7 +128,9 @@ _c_flags += $(if $(patsubst n%,, \
 endif
 
 ifdef CONFIG_SYMBOL_PREFIX
-_cpp_flags += -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))
+_sym_flags = -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))
+_cpp_flags += $(_sym_flags)
+_a_flags += $(_sym_flags)
 endif