Small cleanup & update constraints

OBS-URL: https://build.opensuse.org/package/show/devel:tools:compiler/llvm?expand=0&rev=468

_constraints

@@ -1,6 +1,9 @@
 <?xml version="1.0"?>
 <constraints>
   <hardware>
+    <disk>
+        <size unit="G">30</size>
+    </disk>
     <memory>
       <size unit="M">4000</size>
     </memory>

llvm.spec

@@ -135,7 +135,6 @@ Conflicts:      otherproviders(cmake(LLVM))
 Requires:       %{name} = %{version}
 Requires:       binutils-devel >= 2.21.90
 Requires:       bison
-Requires:       cmake
 Requires:       flex
 Requires:       groff
 Requires:       libstdc++-devel
@@ -462,7 +461,6 @@ export CXX=${PWD}/stage1/bin/clang++
     -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--as-needed" \
     -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--as-needed"
 ninja -v -j $ninjaproc
-cd ..
 
 %install
 %cmake_install
@@ -556,7 +554,6 @@ rm %{buildroot}%{_datadir}/clang/clang-format-sublime.py
 %fdupes -s %{buildroot}%{_docdir}/%{name}
 %fdupes -s %{buildroot}%{_docdir}/%{name}-doc
 
-
 %check
 cd build
 %ifnarch armv7hl armv7l
@@ -574,7 +571,6 @@ ninja -v %{?_smp_mflags} check-libcxxabi
 %endif
 %endif
 
-
 %post -n libLLVM%{_sonum} -p /sbin/ldconfig
 %postun -n libLLVM%{_sonum} -p /sbin/ldconfig