release: Use "debug info" for lib32 set description

This mirrors the changes applied to kernel debug symbol sets in commit
9a354a41be.

Reviewed by:	emaste
Sponsored by:	AFRL, DARPA
Differential Revision:	https://reviews.freebsd.org/D59058

release/scripts/make-manifest.sh

@@ -22,7 +22,7 @@ desc_kernel_dbg="${kernel} debug info"
 desc_kernel_alt="Alternate ${kernel}"
 desc_kernel_alt_dbg="Alternate ${kernel} debug info"
 desc_lib32="${lib32}"
-desc_lib32_dbg="${lib32} (Debugging)"
+desc_lib32_dbg="${lib32} debug info"
 desc_ports="${ports}"
 desc_src="${src}"
 desc_tests="${tests}"