webappmanager: add dependency on serviceinstaller and bump PR

Compilation fails otherwise:

| /home/morphis/data/oe/webos-ports-setup/webos-ports/tmp-eglibc/sysroots/
  x86_64-linux/usr/libexec/armv7a-vfp-neon-webos-linux-gnueabi/gcc/arm-webos-linux-gnueabi/4.7.2/ld:
cannot find -lserviceinstaller
| collect2: error: ld returned 1 exit status

Open-webOS-DCO-1.0-Signed-off-by: Simon Busch <morphis@gravedo.de>

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>