libgo: leave Int64Align as 8 on 32-bit SPARC

    
    Verified by testing on SPARC Solaris.
    
    Reviewed-on: https://go-review.googlesource.com/31675

From-SVN: r241430

gcc/go/gofrontend/MERGE

-df6046971233854e5b7533140d4ead095ab69857
+9806c8a8e4e448eaf6810ff1acffa715745d2549
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/configure

@@ -13841,7 +13841,6 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   GOARCH=sparc
 GOARCH_FAMILY=SPARC
-GOARCH_INT64ALIGN=4
 
 else
   GOARCH=sparc64

libgo/configure.ac

@@ -364,7 +364,6 @@ GOARCH_MINFRAMESIZE=8
 #endif],
 [GOARCH=sparc
 GOARCH_FAMILY=SPARC
-GOARCH_INT64ALIGN=4
 ],
 [GOARCH=sparc64
 GOARCH_FAMILY=SPARC64