build: clear execute bit from Go files

R=golang-dev, rsc
CC=golang-dev, mike.rosset
https://golang.org/cl/4950062

diff --git a/src/cmd/godoc/snippet.go b/src/cmd/godoc/snippet.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/src/pkg/big/int.go b/src/pkg/big/int.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/src/pkg/big/int_test.go b/src/pkg/big/int_test.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/src/pkg/big/nat.go b/src/pkg/big/nat.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/src/pkg/big/nat_test.go b/src/pkg/big/nat_test.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/src/pkg/crypto/rand/rand_windows.go b/src/pkg/crypto/rand/rand_windows.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/src/pkg/math/atan2_decl.go b/src/pkg/math/atan2_decl.go
old mode 100755 (executable)
new mode 100644 (file)

diff --git a/test/hashmap.go b/test/hashmap.go
old mode 100755 (executable)
new mode 100644 (file)