emulators/tiemu3: Modernize Makefile and fix issues

• Add LIB_DEPENDS that stage-qa says should be there
• Add USE_GNOME that stage-qa says should be there
• Add localbase to USES and remove the parts setting those in CPPFLAGS and LDFLAGS
• Correct the linker flag of -export-dynamic to -Wl,-E instead

PR: 252890
Submitted by: cyberbotx@cyberbotx.com (maintainer)