Generate optimized static-rt binaries by default

tools/freebsd-gcc-9.dds

 Flags: -D SPDLOG_COMPILED_LIB -Werror=return-type -Wno-conversion
 C++-Flags: -std=c++2a -fconcepts
 Link-Flags: -static-libgcc -static-libstdc++
-Debug:  True
+Optimize: True
 Compiler-Launcher: ccache

tools/gcc-9.dds

 # Range-v3 0.10.0 contains an accidental conversion warning
 Flags: -D SPDLOG_COMPILED_LIB -Werror=return-type -Wno-sign-compare -Wno-conversion
 C++-Flags: -fconcepts -std=c++2a
-# Link-Flags: -static-libgcc -static-libstdc++
-Debug: True
-#Optimize: True
+Link-Flags: -static-libgcc -static-libstdc++
+Optimize: True
 Compiler-Launcher: ccache