bpo-31609: Fixes quotes in PCbuild/clean.bat (#4280)

diff --git a/Misc/NEWS.d/next/Build/2017-11-04-15-35-08.bpo-31609.k7_nBR.rst b/Misc/NEWS.d/next/Build/2017-11-04-15-35-08.bpo-31609.k7_nBR.rst
new file mode 100644
index 0000000..0e950e3
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2017-11-04-15-35-08.bpo-31609.k7_nBR.rst
@@ -0,0 +1 @@
+Fixes quotes in PCbuild/clean.bat
diff --git a/PCbuild/clean.bat b/PCbuild/clean.bat
index 6144c71..d75198a 100644
--- a/PCbuild/clean.bat
+++ b/PCbuild/clean.bat
@@ -2,4 +2,4 @@
 rem A batch program to clean a particular configuration,
 rem just for convenience.
 
-call %~dp0build.bat -t Clean %*
+call "%~dp0build.bat" -t Clean %*