Move pthread-win32.h to /port, modify bcc/msvc makefiles.

src/interfaces/libpq/bcc32.mak

@@ -62,7 +62,7 @@ OUTFILENAME=blibpq
 USERDEFINES=FRONTEND;NDEBUG;WIN32;_WINDOWS;HAVE_VSNPRINTF;HAVE_STRDUP;
 
 CPP=bcc32.exe
-CPP_PROJ = -I$(BCB)\include;..\..\include -n"$(INTDIR)" -WD -c -D$(USERDEFINES) -tWM \
+CPP_PROJ = -I$(BCB)\include;..\..\include;..\..\include\port\win32;..\..\include\port\win32_msvc;..\..\port -n"$(INTDIR)" -WD -c -D$(USERDEFINES) -tWM \
 		-a8 -X -w-use -w-par -w-pia -w-csu -w-aus -w-ccc
 
 !IFDEF DEBUG

src/interfaces/libpq/win32.mak

@@ -119,7 +119,7 @@ pg_config_paths.h: win32.mak
 "$(OUTDIR)" :
     if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
 
-CPP_PROJ=/nologo /W3 /GX $(OPT) /I "..\..\include" /I "..\..\include\port\win32" /I "..\..\include\port\win32_msvc" /I. /D "FRONTEND" $(DEBUGDEF) /D\
+CPP_PROJ=/nologo /W3 /GX $(OPT) /I "..\..\include" /I "..\..\include\port\win32" /I "..\..\include\port\win32_msvc" /I "..\..\port" /I. /D "FRONTEND" $(DEBUGDEF) /D\
  "WIN32" /D "_WINDOWS" /Fp"$(INTDIR)\libpq.pch" /YX\
  /Fo"$(INTDIR)\\" /Fd"$(INTDIR)\\" /FD /c  /D "HAVE_VSNPRINTF" /D "HAVE_STRDUP"