[logalizer][fix] add pcre lib to plotprofile, weird...

Very weird stuff: works here on several Ubuntu 12.04 machines without explictly adding -lpcre
For Pranay it only works with explicitly adding it gcc ... --verbose outputs _exactly_ the same stuff as on my machine, but he gets:
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libglibivy.a(ivybind.o):function IvyBindingCompile: error: undefined reference to 'pcre_compile'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libglibivy.a(ivybind.o):function IvyBindingCompile: error: undefined reference to 'pcre_study'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libglibivy.a(ivybind.o):function IvyBindingCompile: error: undefined reference to 'pcre_fullinfo'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libglibivy.a(ivybind.o):function IvyBindingFree: error: undefined reference to 'pcre_free'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libglibivy.a(ivybind.o):function IvyBindingFree: error: undefined reference to 'pcre_free'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libglibivy.a(ivybind.o):function IvyBindingExec: error: undefined reference to 'pcre_exec'
collect2: ld returned 1 exit status