restore use of .type in asm, but use modern @function (vs %function)

this seems to be necessary to make the linker accept the functions in
a shared library (perhaps to generate PLT entries?)

strictly speaking libc-internal asm should not need it. i might clean
that up later.

src/setjmp/i386/longjmp.s

@@ -1,5 +1,7 @@
 .global _longjmp
 .global longjmp
+.type _longjmp,@function
+.type longjmp,@function
 _longjmp:
 longjmp:
 	mov  4(%esp),%edx

src/setjmp/i386/setjmp.s

@@ -1,6 +1,9 @@
 .global __setjmp
 .global _setjmp
 .global setjmp
+.type __setjmp,@function
+.type _setjmp,@function
+.type setjmp,@function
 __setjmp:
 _setjmp:
 setjmp:

src/setjmp/x86_64/longjmp.s

@@ -1,6 +1,8 @@
 /* Copyright 2011 Nicholas J. Kain, licensed GNU LGPL 2.1 or later */
 .global _longjmp
 .global longjmp
+.type _longjmp,@function
+.type longjmp,@function
 _longjmp:
 longjmp:
 	mov %rsi,%rax           /* val will be longjmp return */

src/setjmp/x86_64/setjmp.s

@@ -2,6 +2,9 @@
 .global __setjmp
 .global _setjmp
 .global setjmp
+.type __setjmp,@function
+.type _setjmp,@function
+.type setjmp,@function
 __setjmp:
 _setjmp:
 setjmp: