make linker flags conditional when used, not when defined

gb_LINKEROPTFLAGS and gb_LINKERSTRIPDEBUGFLAGS are only used by
gb_LinkTarget__get_debugldflags, which already properly uses them
depending on whether debuginfo is wanted or not

Change-Id: I0befc10d6f1ee99ccd49a640241e3ae023454875
Reviewed-on: https://gerrit.libreoffice.org/70366
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

solenv/gbuild/platform/solaris.mk

@@ -86,12 +86,7 @@ endif
 
 # sun ld doesn't understand -O1 optimize flag
 gb_LINKEROPTFLAGS :=
-
-ifeq ($(gb_SYMBOL),$(true))
-gb_LINKERSTRIPDEBUGFLAGS :=
-else
 gb_LINKERSTRIPDEBUGFLAGS := -Wl,-zredlocsym -Wl,-znoldynsym
-endif
 
 # LinkTarget class
 

solenv/gbuild/platform/unxgcc.mk

@@ -83,17 +83,8 @@ endif
 endif
 endif
 
-ifneq ($(gb_DEBUGLEVEL),0)
-gb_LINKEROPTFLAGS :=
-else
 gb_LINKEROPTFLAGS := -Wl,-O1
-endif
-
-ifeq ($(gb_SYMBOL),$(true))
-gb_LINKERSTRIPDEBUGFLAGS :=
-else
 gb_LINKERSTRIPDEBUGFLAGS := -Wl,-S
-endif
 
 # LinkTarget class