Bazel: Fix invocation of mktemp for OSX pre El Capitan

It seems that on OSX prior to 10.11.x (El Capitan) the mktemp command
doesn't work with only the -d option. The -t option is also required.

Add a fallback to use the -t option if the call with only -d fails.

See [1] for various discussion around this issue.

[1] http://unix.stackexchange.com/q/30091/130341

Bug: Issue 4826
Change-Id: Ie536e2ae071d4247a16f5c390198b8a590086d05

polygerrit-ui/app/BUILD

@@ -43,7 +43,7 @@ filegroup(
 genrule(
   name = "polygerrit_ui",
   cmd = " && ".join([
-    "t=$$(mktemp  -d)",
+    "t=$$(mktemp -d || mktemp -d -t bazel-tmp)",
     "p=$$PWD",
     "mkdir -p $$t/polygerrit_ui/{styles,fonts,bower_components/{highlightjs,webcomponentsjs},elements}",
     "cp $(locations :gr-app) $$t/polygerrit_ui/elements/",

tools/bzl/genrule2.bzl

@@ -20,7 +20,7 @@
 def genrule2(out, cmd, **kwargs):
   cmd = ' && '.join([
     'ROOT=$$PWD',
-    'TMP=$$(mktemp -d)',
+    'TMP=$$(mktemp -d || mktemp -d -t bazel-tmp)',
     '(' + cmd + ')',
   ])
   native.genrule(

tools/bzl/js.bzl

@@ -87,7 +87,7 @@ def _bower_archive(ctx):
     fail("failed %s: %s" % (" ".join(cmd), out.stderr))
 
   _bash(ctx, " && " .join([
-    "TMP=$(mktemp -d )",
+    "TMP=$(mktemp -d || mkdir -d -t bazel-tmp)",
     "cd $TMP",
     "mkdir bower_components",
     "cd bower_components",