firefox: Update version from 49.0 to 49.0.2

Release notes for 49.0.1 [1]:

> Version 49.0.1, first offered to Release channel users on September
> 23, 2016
>
> ### Fixed ###
>
> *   Mitigate a startup crash issue caused by Websense (Windows
>     only) (Bug 1304783)

Release notes for 49.0.2 [2]:

> Version 49.0.2, first offered to Release channel users on October 20,
> 2016
>
> ### New ###
>
> *   Asynchronous rendering of the Flash plugins is now enabled by
>     default. This should improve performance and reduce crashes for
>     sites that use the Flash plugin. (Bug 1307108)
>
> ### Fixed ###
>
> *   Change D3D9 default fallback preference to prevent graphical
>     artifacts (Bug 1306465)
> *   Network issue prevents some users from seeing the Firefox UI on
>     startup (Bug 1305436)
> *   Web compatibility issue with file uploads (Bug 1306472)
> *   Various security fixes
> *   Web compatibility issue with Array.prototype.values (Bug 1299593)
>
> ### Changed ###
>
> *   Diagnostic information on timing for tab switching (Bug 1304113)
> *   Fix a Canvas filters graphics issue affecting HTML5 apps (Bug
>     1304539)

[1] https://www.mozilla.org/en-US/firefox/49.0.1/releasenotes/
[2] https://www.mozilla.org/en-US/firefox/49.0.2/releasenotes/

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-49.0-0
+# BEE_VERSION firefox-49.0.2-0
 
 SRCURL[0]="https://ftp.mozilla.org/pub/firefox/releases/${PKGVERSION}/source/firefox-${PKGVERSION}.source.tar.xz"