libbsd: add support for aarch64

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 43354

package/libs/libbsd/patches/001-aarch64_support.patch

@@ -0,0 +1,19 @@
+--- a/src/local-elf.h
++++ b/src/local-elf.h
+@@ -165,6 +165,16 @@
+ #endif
+ #define ELF_TARG_DATA	ELFDATA2MSB
+ 
++#elif defined(__aarch64__)
++
++#define ELF_TARG_MACH	EM_AARCH64
++#define ELF_TARG_CLASS	ELFCLASS64
++#ifdef __AARCH64EB__
++#define ELF_TARG_DATA	ELFDATA2MSB
++#else
++#define ELF_TARG_DATA	ELFDATA2LSB
++#endif
++
+ #else
+ 
+ #error Unknown ELF machine type