Telephony(MSIM) : Add telephony-msim jar to build

Enable telephony-msim jar by adding it in PRODUCT_BOOT_JARS
 and PRODUCT_PACKAGES

Change-Id: Ibc80a19d3e0c39dfbe885916d61147055f3801a9
(cherry picked from commit b9ebc2172e9b646cb573fa5610f8a2829874b2a7)
(cherry picked from commit 2aff65e670639f07c0962f04b65f812618a181b9)
gettop: fix symlink detection

Summary: We must use the -P flag for pwd to properly get $PWD from the environment *with* symlinks. Otherwise symlink
detection is broken and anything we do using $(gettop) at the top of a symlinked path won't work properly. I noticed this
issue while running on a system that has a SSD RAID symlinked to my android build home directory, which is ~/ssd_storage.
The top in this instance is a symlink, which means that gettop() returns my home path, or the path above the symlink
directory (but not the symlinked directory). This is a major issue in case developers choose to use $(gettop),
$ANDROID_BUILD_TOP, or $T (doesn't really matter either way).

Test Plan: Create a symlink and sync android source into the path. Open up the symlink, run envsetup.sh, and check
$(gettop) output.

While this isn't the best solution, it fixes an issue without creating new issues.

Change-Id: I65bc345753805e6161098d2af6e0bee0b07d37b1