inject: Fix windows psapi mess by explicitly defining version

Otherwise, the compiler does not link the correct version of that
API. See the requirements section at the bottom of the page here:
https://docs.microsoft.com/en-us/windows/win32/api/psapi/nf-psapi-getmodulebasenamea

GNUmakefile

@@ -26,7 +26,7 @@ toolchain_64          := x86_64-w64-mingw32-
 gitrev                := $(shell git rev-parse HEAD)
 cppflags              := -I src -I src/main -I src/test -DGITREV=$(gitrev)
 cflags                := -O2 -pipe -ffunction-sections -fdata-sections \
-                          -Wall -std=c99
+                          -Wall -std=c99 -DPSAPI_VERSION=1
 cflags_release        := -Werror
 ldflags		          := -Wl,--gc-sections -static-libgcc