pgsql: Fix meson build with -Duuid=ossp when using version older than 0

Fix meson build with -Duuid=ossp when using version older than 0.60

The package for the UUID library may be named "uuid" or "ossp-uuid", and
meson.build has been using a single call of dependency() with multiple
names, something only supported since meson 0.60.0.

The minimum version of meson supported by Postgres is 0.57.2 on HEAD,
since f039c2244110, and 0.54 on stable branches down to 16.

Author: Oreo Yang <oreo(dot)yang(at)hotmail(dot)com>
Reviewed-by: Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>
Discussion: https://postgr.es/m/OS3P301MB01656E6F91539770682B1E77E711A@OS3P301MB0165.JPNP301.PROD.OUTLOOK.COM
Backpatch-through: 16

Branch
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REL_18_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/5f565b0aee90ef94fbfcfce0beadc10c0ccdd463

Modified Files
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meson.build | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)