[PGO] move names of runtime sections definitions to InstrProfData.inc 

In profile runtime implementation for Darwin, Linux and FreeBSD, the
names of sections holding profile control/counter/naming data need
to be known by the runtime in order to locate the start/end of the
data. Moving the name definitions to the common file to specify the
connection.






git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253814 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed