Update golang

[tianon]

Changes:

• docker-library/golang@b22b41f: Merge pull request Update GO386 to "softfloat" in 1.16+ golang#355 from infosiftr/alpine-386
• docker-library/golang@e069ef4: Update GO386 to "softfloat" in 1.16+

[github-actions]

Diff for 15e8a0d:

diff --git a/_bashbrew-cat b/_bashbrew-cat
index ff6d6bb..ef63956 100644
--- a/_bashbrew-cat
+++ b/_bashbrew-cat
@@ -87,12 +87,12 @@ Constraints: windowsservercore-ltsc2016
 
 Tags: 1.16beta1-alpine3.12, 1.16-rc-alpine3.12, rc-alpine3.12
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 2d03ce7ef01477465c84c13d68818ab2bedc7b16
+GitCommit: e069ef401a3eee2d16b5ad4dce939eaa02ae1bd1
 Directory: 1.16-rc/alpine3.12
 
 Tags: 1.16beta1-alpine3.13, 1.16-rc-alpine3.13, rc-alpine3.13, 1.16beta1-alpine, 1.16-rc-alpine, rc-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 0300e67182c4e18538e4aab6dd0a4630986facfb
+GitCommit: e069ef401a3eee2d16b5ad4dce939eaa02ae1bd1
 Directory: 1.16-rc/alpine3.13
 
 Tags: 1.16beta1-buster, 1.16-rc-buster, rc-buster
diff --git a/golang_rc-alpine/Dockerfile b/golang_rc-alpine/Dockerfile
index 7f15c1e..fc28814 100644
--- a/golang_rc-alpine/Dockerfile
+++ b/golang_rc-alpine/Dockerfile
@@ -43,7 +43,7 @@ RUN set -eux; \
 	case "$apkArch" in \
 		armhf) export GOARM='6' ;; \
 		armv7) export GOARM='7' ;; \
-		x86) export GO386='387' ;; \
+		x86) export GO386='softfloat' ;; \
 	esac; \
 	\
 # https://github.com/golang/go/issues/38536#issuecomment-616897960
diff --git a/golang_rc-alpine3.12/Dockerfile b/golang_rc-alpine3.12/Dockerfile
index bcb8934..678e9d4 100644
--- a/golang_rc-alpine3.12/Dockerfile
+++ b/golang_rc-alpine3.12/Dockerfile
@@ -43,7 +43,7 @@ RUN set -eux; \
 	case "$apkArch" in \
 		armhf) export GOARM='6' ;; \
 		armv7) export GOARM='7' ;; \
-		x86) export GO386='387' ;; \
+		x86) export GO386='softfloat' ;; \
 	esac; \
 	\
 # https://github.com/golang/go/issues/38536#issuecomment-616897960