gnu: Add ceph.

* gnu/packages/storage.scm,
  gnu/packages/patches/ceph-disable-cpu-optimizations.patch,
  gnu/packages/patches/ceph-skip-collect-sys-info-test.patch,
  gnu/packages/patches/ceph-skip-unittest_blockdev.patch: New files.
* gnu/local.mk (GNU_SYSTEM_MODULES, dist_patch_DATA): Register it.

gnu/packages/patches/ceph-disable-cpu-optimizations.patch

@@ -0,0 +1,46 @@
+Disable CPU optimizations not supported by the vast majority of
+x86_64 systems. Also don't add anything for i686.
+
+--- a/cmake/modules/SIMDExt.cmake	2017-03-23 22:22:58.254071694 +0100
++++ b/cmake/modules/SIMDExt.cmake	2017-03-23 22:23:22.446848845 +0100
+@@ -6,10 +6,6 @@
+ # HAVE_INTEL_SSE
+ # HAVE_INTEL_SSE2
+ # HAVE_INTEL_SSE3
+-# HAVE_INTEL_SSSE3
+-# HAVE_INTEL_PCLMUL
+-# HAVE_INTEL_SSE4_1
+-# HAVE_INTEL_SSE4_2
+ #
+ # SIMD_COMPILE_FLAGS
+ #
+@@ -41,7 +37,7 @@
+   if(HAVE_ARM_NEON)
+     set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mfpu=neon")
+   endif()
+-elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i386|i686|amd64|x86_64|AMD64")
++elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
+   set(HAVE_INTEL 1) 
+   CHECK_C_COMPILER_FLAG(-msse HAVE_INTEL_SSE)
+   if(HAVE_INTEL_SSE)
+@@ -55,20 +51,4 @@
+   if(HAVE_INTEL_SSE3)
+     set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse3")
+   endif()
+-  CHECK_C_COMPILER_FLAG(-mssse3 HAVE_INTEL_SSSE3)
+-  if(HAVE_INTEL_SSSE3)
+-    set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mssse3")
+-  endif()
+-  CHECK_C_COMPILER_FLAG(-mpclmul HAVE_INTEL_PCLMUL)
+-  if(HAVE_INTEL_PCLMUL)
+-    set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mpclmul")
+-  endif()
+-  CHECK_C_COMPILER_FLAG(-msse4.1 HAVE_INTEL_SSE4_1)
+-  if(HAVE_INTEL_SSE4_1)
+-    set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.1")
+-  endif()
+-  CHECK_C_COMPILER_FLAG(-msse4.2 HAVE_INTEL_SSE4_2)
+-  if(HAVE_INTEL_SSE4_2)
+-    set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.2")
+-  endif()
+ endif()