gcc: fix path to powerpc musl dynamic linker with 5.2 (#20501)

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

SVN-Revision: 46897

toolchain/gcc/patches/5.2.0/270-musl-add-powerpc-softfloat-fix.patch

@@ -0,0 +1,24 @@
+--- a/gcc/config/rs6000/linux64.h
++++ b/gcc/config/rs6000/linux64.h
+@@ -369,8 +369,8 @@ extern int dot_symbols;
+ #endif
+ #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
+ #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
+-#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E ".so.1"
+-#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-powerpc64" MUSL_DYNAMIC_LINKER_E ".so.1"
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1"
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-powerpc64" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1"
+ #if DEFAULT_LIBC == LIBC_UCLIBC
+ #define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}"
+ #elif DEFAULT_LIBC == LIBC_GLIBC
+--- a/gcc/config/rs6000/sysv4.h
++++ b/gcc/config/rs6000/sysv4.h
+@@ -770,7 +770,7 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
+-#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E ".so.1"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1"
+ #if DEFAULT_LIBC == LIBC_UCLIBC
+ #define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}"
+ #elif DEFAULT_LIBC == LIBC_MUSL