Merge bitcoin/bitcoin#33304: depends: strip when installing qt binaries

c9d5f21 depends: strip when installing qt (fanquake)

Pull request description:

  Otherwise we end up with ~1.5GB of binaries (Linux) when `DEBUG=1`. This isn't great generally, but is worse in the CI, where disk may be limited (#33293).

ACKs for top commit:
  TheCharlatan:
    ACK c9d5f21
  hebasto:
    ACK c9d5f21.

Tree-SHA512: bf83e0d8c41c64aaa6d841e24c4f25bbe33034ae54a32f34ca14aca59eaa1a004809d48acf171414ed43b99f7d3d1f4b973aee0b272475bd7cc2ca708718b8da

Author: fanquake

depends/packages/native_qt.mk

@@ -147,7 +147,7 @@ define $(package)_build_cmds
 endef
 
 define $(package)_stage_cmds
-  cmake --install . --prefix $($(package)_staging_prefix_dir)
+  cmake --install . --prefix $($(package)_staging_prefix_dir) --strip
 endef
 
 define $(package)_postprocess_cmds

depends/packages/qt.mk

@@ -278,7 +278,7 @@ define $(package)_build_cmds
 endef
 
 define $(package)_stage_cmds
-  cmake --install . --prefix $($(package)_staging_prefix_dir)
+  cmake --install . --prefix $($(package)_staging_prefix_dir) --strip
 endef
 
 define $(package)_postprocess_cmds