guile:meta/Makefile change install-data-hook to install-exec-hook

guile:meta/Makefile change install-data-hook to install-exec-hook

In guile meta/Makefile, what install-data-hook do
must be run after install-binSCRIPTS.so it's a exec hook, not a data hook.
If keep these exec-hook in data-hook,when we run make with multi-jobbing ,
install-data-hook and install-binSCRIPTS will be separately
processed in different thread, no any dependence.
that will cause error sometimes.

[YOCTO #2796]

(From OE-Core rev: 018d5b87bdf00e85fe34e6276bd99e118843d704)

Signed-off-by: Song.Li <Song.Li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>