cmake: exclude unittest_alloc_aging from "all"

[tchaikov]

link it against GTest::Main, which was remove by
96a0439.

Signed-off-by: Kefu Chai kchai@redhat.com

Checklist

• References tracker ticket
• Updates documentation if necessary
• Includes tests for new functionality or reproducer for bug

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[tchaikov]

this should fix the FTBFS of

Scanning dependencies of target unittest_alloc_aging
[ 72%] Building CXX object src/test/objectstore/CMakeFiles/unittest_alloc_aging.dir/Allocator_aging_fragmentation.cc.o
/home/jenkins-build/build/workspace/ceph-dev-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/15.1.0-1050-gc8e67ba/rpm/el7/BUILD/ceph-15.1.0-1050-gc8e67ba/src/test/objectstore/Allocator_aging_fragmentation.cc:9:10: fatal error: gtest/gtest.h: No such file or directory
 #include <gtest/gtest.h>
          ^~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [src/test/objectstore/CMakeFiles/unittest_alloc_aging.dir/Allocator_aging_fragmentation.cc.o] Error 1
make[1]: *** [src/test/objectstore/CMakeFiles/unittest_alloc_aging.dir/all] Error 2

[tchaikov]

being tested at https://shaman.ceph.com/builds/ceph/wip-unitest-alloc-aging-kefu/82ca335e7bec13a845697f4eef17e164419d68e8/default/192362/