update elf.h with new aarch64 relocs

add ilp32 related relocs and alternative names for a few macros following
https://sourceware.org/ml/libc-alpha/2014-11/msg00455.html

include/elf.h

@@ -2105,8 +2105,17 @@ typedef Elf32_Addr Elf32_Conflict;
 #define SHT_ARM_PREEMPTMAP	(SHT_LOPROC + 2)
 #define SHT_ARM_ATTRIBUTES	(SHT_LOPROC + 3)
 
-
 #define R_AARCH64_NONE            0
+#define R_AARCH64_P32_ABS32	1
+#define R_AARCH64_P32_COPY	180
+#define R_AARCH64_P32_GLOB_DAT	181
+#define R_AARCH64_P32_JUMP_SLOT	182
+#define R_AARCH64_P32_RELATIVE	183
+#define R_AARCH64_P32_TLS_DTPMOD 184
+#define R_AARCH64_P32_TLS_DTPREL 185
+#define R_AARCH64_P32_TLS_TPREL	186
+#define R_AARCH64_P32_TLSDESC	187
+#define R_AARCH64_P32_IRELATIVE	188
 #define R_AARCH64_ABS64         257
 #define R_AARCH64_ABS32         258
 #define R_AARCH64_ABS16		259
@@ -2224,8 +2233,11 @@ typedef Elf32_Addr Elf32_Conflict;
 #define R_AARCH64_GLOB_DAT     1025
 #define R_AARCH64_JUMP_SLOT    1026
 #define R_AARCH64_RELATIVE     1027
+#define R_AARCH64_TLS_DTPMOD   1028
 #define R_AARCH64_TLS_DTPMOD64 1028
+#define R_AARCH64_TLS_DTPREL   1029
 #define R_AARCH64_TLS_DTPREL64 1029
+#define R_AARCH64_TLS_TPREL    1030
 #define R_AARCH64_TLS_TPREL64  1030
 #define R_AARCH64_TLSDESC      1031