Merge pull request #103 from altendky/add_quotes

add missing quotes to `configure` example in readme

Author: sylvestre

README.md

@@ -81,9 +81,9 @@ With cmake, add the following argument:
 With configure, call it with:
 ```
 # With gcc
-./configure CC="sccache gcc" CXX=sccache gcc"
+./configure CC="sccache gcc" CXX="sccache gcc"
 # With clang
-./configure CC="sccache clang" CXX=sccache clang"
+./configure CC="sccache clang" CXX="sccache clang"
 ```
 
 ## Prepare a new release