PycURL: try to fix the definition of pythonVersion for the buildbots.

For some unknown reason the previous definition was not working on
the build servers, although it was on my system.

dev-python/pycurl/pycurl-7.43.0.2.recipe

@@ -64,8 +64,8 @@ fi
 for i in "${!PYTHON_PACKAGES[@]}"; do
 	pythonPackage=${PYTHON_PACKAGES[i]}
 	pythonLibSuffix=${PYTHON_LIBSUFFIXES[$i]}
-	pythonVersion="`$pythonPackage --version 2>&1 | sed -n \
-		-e "s/Python \([0-9]*\.[0-9]*\)\..*/\1/p"`"
+	pythonVersion=`eval "$pythonPackage --version 2>&1" | sed -n \
+		-e "1s/Python \([0-9]*\.[0-9]*\)\..*/\1/p"`
 	PYTHON_VERSIONS+=($pythonVersion)
 
 	eval "PROVIDES_${pythonPackage}=\"