boost: fix install of fiber shared libraries

For fiber, only CMake modules were installed in boost 1.78.0.
In 1.79.0 and versions before 1.78.0 also the shared libraries
are installed. This upstream patch fixes the issue in 1.78.0.

Note that boost git repo does not show changes in tools/build
directory between 1.78.0 and 1.79.0 tags but the release tar balls
contain a large update of which this one is needed to fix the missing
shared libraries.

Only kirkstone is affected.

buildhistory shows the difference in metadata boost-fiber binary package
without and with this patch:

 --- a/packages/core2-64-poky-linux/boost/boost-fiber/latest
 +++ b/packages/core2-64-poky-linux/boost/boost-fiber/latest
@@ -1,8 +1,9 @@
 PV = 1.78.0
 PR = r0
-RPROVIDES =
-RDEPENDS =
+PKG = libboost-fiber1.78.0
+RPROVIDES = boost-fiber (=1.78.0)
+RDEPENDS = boost-context (>= 1.78.0) glibc (>= 2.35) libgcc (>= 11.3.0) libstdc++ (>= 11.3.0)
 RRECOMMENDS =
-PKGSIZE = 0
+PKGSIZE = 80032
 FILES = /usr/lib/libboost_fiber*.so.*
-FILELIST =
+FILELIST = /usr/lib/libboost_fiber.so.1.78.0

Signed-off-by: Mikko Rapeli <mikko.rapeli@bmw.de>
Signed-off-by: Steve Sakoman <steve@sakoman.com>