dev-util/bazel: add upstream musl patch

Closes: https://bugs.gentoo.org/815907
Signed-off-by: Sam James <sam@gentoo.org>

dev-util/bazel/bazel-3.7.2-r1.ebuild

@@ -66,6 +66,7 @@ src_prepare() {
 	addpredict /proc
 
 	eapply "${FILESDIR}/${PN}-3.2.0-include-limits-for-gcc-11.patch"
+	eapply "${FILESDIR}/${PN}-3.7.2-musl-temp-failure-retry.patch"
 }
 
 src_compile() {

dev-util/bazel/files/bazel-3.7.2-musl-temp-failure-retry.patch

@@ -0,0 +1,34 @@
+https://bugs.gentoo.org/815907
+https://github.com/bazelbuild/bazel/commit/bcce6dd026e90336e80616a8c1004a79a2f8640c
+
+From: philwo <philwo@google.com>
+Date: Thu, 20 May 2021 08:13:09 -0700
+Subject: [PATCH] Add the TEMP_FAILURE_RETRY macro to linux-sandbox-pid1.cc.
+
+This allows us to build Bazel on Linux systems which use a C standard library that does not include this macro, like Alpine Linux (which uses musl).
+
+Fixes #12460.
+
+PiperOrigin-RevId: 374873483
+--- a/src/main/tools/linux-sandbox-pid1.cc
++++ b/src/main/tools/linux-sandbox-pid1.cc
+@@ -49,6 +49,19 @@
+ #include <linux/fs.h>
+ #endif
+ 
++#ifndef TEMP_FAILURE_RETRY
++// Some C standard libraries like musl do not define this macro, so we'll
++// include our own version for compatibility.
++#define TEMP_FAILURE_RETRY(exp)            \
++  ({                                       \
++    decltype(exp) _rc;                     \
++    do {                                   \
++      _rc = (exp);                         \
++    } while (_rc == -1 && errno == EINTR); \
++    _rc;                                   \
++  })
++#endif  // TEMP_FAILURE_RETRY
++
+ #include "src/main/tools/linux-sandbox-options.h"
+ #include "src/main/tools/linux-sandbox.h"
+ #include "src/main/tools/logging.h"