Make all the ELF relocation constants available.

BSD thinks you should only get the relocation constants for your target
architecture, but it's often useful to have them all available at once.
Rearrange the headers to enable that.

Also update the (modified) NetBSD files to CVS HEAD.

Also remove the unused BSDism R_TYPE.

Bug: N/A
Test: builds
Change-Id: Iad5ef29192a732696e2b36af35144a9ca116aa46
diff --git a/libc/include/bits/elf_x86.h b/libc/include/bits/elf_x86.h
new file mode 100644
index 0000000..dfbaba0
--- /dev/null
+++ b/libc/include/bits/elf_x86.h
@@ -0,0 +1,60 @@
+/*	$NetBSD: elf_machdep.h,v 1.12 2016/02/02 20:16:59 christos Exp $	*/
+
+#ifndef _X86_ELF_MACHDEP_H_
+#define _X86_ELF_MACHDEP_H_
+
+/* i386 relocations */
+#define	R_386_NONE	0
+#define	R_386_32	1
+#define	R_386_PC32	2
+#define	R_386_GOT32	3
+#define	R_386_PLT32	4
+#define	R_386_COPY	5
+#define	R_386_GLOB_DAT	6
+#define	R_386_JMP_SLOT	7
+#define	R_386_RELATIVE	8
+#define	R_386_GOTOFF	9
+#define	R_386_GOTPC	10
+#define	R_386_32PLT	11
+
+/* TLS relocations */
+#define	R_386_TLS_TPOFF	14
+#define	R_386_TLS_IE	15
+#define	R_386_TLS_GOTIE	16
+#define	R_386_TLS_LE	17
+#define	R_386_TLS_GD	18
+#define	R_386_TLS_LDM	19
+
+/* The following relocations are GNU extensions. */
+#define	R_386_16	20
+#define	R_386_PC16	21
+#define	R_386_8		22
+#define	R_386_PC8	23
+
+/* More TLS relocations */
+#define	R_386_TLS_GD_32		24
+#define	R_386_TLS_GD_PUSH	25
+#define	R_386_TLS_GD_CALL	26
+#define	R_386_TLS_GD_POP	27
+#define	R_386_TLS_LDM_32	28
+#define	R_386_TLS_LDM_PUSH	29
+#define	R_386_TLS_LDM_CALL	30
+#define	R_386_TLS_LDM_POP	31
+#define	R_386_TLS_LDO_32	32
+#define	R_386_TLS_IE_32		33
+#define	R_386_TLS_LE_32		34
+#define	R_386_TLS_DTPMOD32	35
+#define	R_386_TLS_DTPOFF32	36
+#define	R_386_TLS_TPOFF32	37
+
+#define R_386_SIZE32		38
+
+/* More TLS relocations */
+#define	R_386_TLS_GOTDESC	39
+#define	R_386_TLS_DESC_CALL	40
+#define	R_386_TLS_DESC		41
+
+#define R_386_IRELATIVE		42
+#define R_386_GOT32X		43
+
+#endif