firefox: Update version from 52.0 to 52.0.1

Release notes [1]:

> Version 52.0.1, first offered to Release channel users on March 17,
> 2017
>
> ### Fixed ###
>
> *   Various security fixes [2]

Fixes for MFSA 2017-08 [2], also known as *CVE-2017-5428: integer
overflow in createImageBitmap()* [3].

[1] https://www.mozilla.org/en-US/firefox/52.0.1/releasenotes/
[2] https://www.mozilla.org/en-US/security/known-vulnerabilities/firefox/#firefox52.0.1
[3] https://www.mozilla.org/en-US/security/advisories/mfsa2017-08/

firefox.be0

@@ -2,7 +2,7 @@
 
 #export BEE_TMP_TMPDIR=/dev/shm BEE_TMP_BUILDROOT=/dev/shm/bee-root BEE_MAKEFLAGS='-j80'
 
-# BEE_VERSION firefox-52.0-0
+# BEE_VERSION firefox-52.0.1-0
 
 SRCURL[0]="https://ftp.mozilla.org/pub/firefox/releases/${PKGVERSION}/source/firefox-${PKGVERSION}.source.tar.xz"