gBenchmark: Development Package (#4847)

* gBenchmark: Development Package

Add the development version (master branch) of `gBenchmark`

* gBenchmark: Remove Duplicate

Remove duplicate `gbenchmark` library
and keep its patch to remove the shipped
-Werror

var/spack/repos/builtin/packages/benchmark/package.py

@@ -22,7 +22,6 @@
 # License along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ##############################################################################
-
 from spack import *
 
 
@@ -32,5 +31,20 @@ class Benchmark(CMakePackage):
     homepage = "https://github.com/google/benchmark"
     url      = "https://github.com/google/benchmark/archive/v1.1.0.tar.gz"
 
+    version('develop', branch='master',
+            git='https://github.com/google/benchmark.git')
+
     version('1.1.0', '66b2a23076cf70739525be0092fc3ae3')
     version('1.0.0', '1474ff826f8cd68067258db75a0835b8')
+
+    def patch(self):
+        filter_file(
+            r'add_cxx_compiler_flag..fstrict.aliasing.',
+            r'##### add_cxx_compiler_flag(-fstrict-aliasing)',
+            'CMakeLists.txt'
+        )
+        filter_file(
+            r'add_cxx_compiler_flag..Werror',
+            r'##### add_cxx_compiler_flag(-Werror',
+            'CMakeLists.txt'
+        )