Accepting request 967904 from home:jfkw:branches:devel:languages:go

- Template gcc-go.patch to substitute gcc_go_version and eliminate
  multiple similar patches each with hardcoded gcc go binary name.
  gcc-go.patch inserts gcc-go binary name e.g. go-8 to compensate
  for current lack of gcc-go update-alternatives usage.
  * add gcc-go.patch
  * drop gcc6-go.patch
  * drop gcc7-go.patch

- For SLE-12 set gcc_go_version to 8 to bootstrap using gcc8-go.
  gcc6-go and gcc7-go no longer successfully bootstrap go1.17 or
  go1.18 on SLE-12 aarch64 ppc64le or s390x.
  * gcc6-go fails with errors e.g. libnoder.a(_go_.o):(.toc+0x0):
    undefined reference to `__go_pimt__I4_DiagFrN4_boolee3

OBS-URL: https://build.opensuse.org/request/show/967904
OBS-URL: https://build.opensuse.org/package/show/devel:languages:go/go1.18?expand=0&rev=13

gcc-go.patch

@@ -48,9 +48,9 @@ Index: go/src/make.rc
 ===================================================================
 --- go.orig/src/make.rc
 +++ go/src/make.rc
-@@ -60,7 +60,7 @@ GOROOT = `{cd .. && pwd}
- if(! ~ $#GOROOT_BOOTSTRAP 1)
- 	GOROOT_BOOTSTRAP = $home/go1.4
+@@ -60,7 +60,7 @@ if(! ~ $#GOROOT_BOOTSTRAP 1){
+ 			GOROOT_BOOTSTRAP = $home/$d
+ }
  for(p in $path){
 -	if(! test -x $GOROOT_BOOTSTRAP/bin/go){
 +	if(! test -x $GOROOT_BOOTSTRAP/bin/go-$gcc_go_version){