removed CLANG_TOOL_DRIVER_BUILD from install toolchain only since it is now used as part of building

Author: mxswd

utils/build-script-impl

@@ -2012,7 +2012,6 @@ for host in "${ALL_HOSTS[@]}"; do
                     -DCLANG_TOOL_ARCMT_TEST_BUILD=NO
                     -DCLANG_TOOL_C_ARCMT_TEST_BUILD=NO
                     -DCLANG_TOOL_C_INDEX_TEST_BUILD=NO
-                    -DCLANG_TOOL_DRIVER_BUILD=NO
                     -DCLANG_TOOL_DIAGTOOL_BUILD=NO
                     -DCLANG_TOOL_SCAN_BUILD_BUILD=NO
                     -DCLANG_TOOL_SCAN_VIEW_BUILD=NO