libosmo{gb,vty}.pc.in: Add talloc to 'Requires'

Both libraries use talloc symbols so they should require it,
see https://gerrit.osmocom.org/c/libosmocore/+/27521/1/libosmogb.pc.in#9

In subsequent patches, we should move all of those to Requires.private,
but I wanted to fix it step by step.

Change-Id: I755275ce4f4148b5beffaa28a6a0ce2dd0e2d6b4
diff --git a/libosmogb.pc.in b/libosmogb.pc.in
index d545ce2..0a62426 100644
--- a/libosmogb.pc.in
+++ b/libosmogb.pc.in
@@ -6,6 +6,6 @@
 Name: Osmocom GPRS Gb Library
 Description: Osmocom GPRS Gb Interface (NS/BSSGP) Library
 Version: @VERSION@
-Requires: libosmocore, libosmovty
+Requires: talloc, libosmocore, libosmovty
 Libs: -L${libdir} -losmogb
 Cflags: -I${includedir}/ -fno-strict-aliasing
diff --git a/libosmovty.pc.in b/libosmovty.pc.in
index 9a907e0..5d9286a 100644
--- a/libosmovty.pc.in
+++ b/libosmovty.pc.in
@@ -6,6 +6,6 @@
 Name: Osmocom VTY Interface Library
 Description: C Utility Library
 Version: @VERSION@
-Requires: libosmocore
+Requires: talloc, libosmocore
 Libs: -L${libdir} -losmovty
 Cflags: -I${includedir}/