gcc: fix accidentally dropped chunk of the musl gcc 5.2.0 powerpc patch (fixes #20501)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 47024

toolchain/gcc/patches/5.2.0/203-musl_powerpc.patch

@@ -194,3 +194,16 @@ gcc/Changelog:
  
 +#undef MUSL_DYNAMIC_LINKER_E
 +#define MUSL_DYNAMIC_LINKER_E ENDIAN_SELECT("","le","le")
+--- a/gcc/config.gcc
++++ b/gcc/config.gcc
+@@ -2410,6 +2410,10 @@ powerpc*-*-linux*)
+ 	    powerpc*-*-linux*paired*)
+ 		tm_file="${tm_file} rs6000/750cl.h" ;;
+ 	esac
++	case ${target} in
++		*-linux*-musl*)
++			enable_secureplt=yes ;;
++	esac
+ 	if test x${enable_secureplt} = xyes; then
+ 		tm_file="rs6000/secureplt.h ${tm_file}"
+ 	fi