deps.ffmpeg: Enable PDBs for FFmpeg builds on Windows

Enable PDBs for FFmpeg builds on Windows for all configurations. If the
configuration is set to Release, or RelWithDebInfo, or MinSizeRel,
adjust the linker options accordingly.

Author: RytoEX

deps.ffmpeg/99-ffmpeg.ps1

@@ -68,7 +68,8 @@ function Configure {
         '--toolchain=msvc'
         ('--extra-cflags=' + "'-D_WINDLL -MD -D_WIN32_WINNT=0x0A00" + $(if ( $Target -eq 'arm64' ) { ' -D__ARM_PCS_VFP' }) + "'")
         ('--extra-cxxflags=' + "'-MD -D_WIN32_WINNT=0x0A00'")
-        ('--extra-ldflags=' + "'-APPCONTAINER:NO -MACHINE:${Target}'")
+        ('--extra-ldflags=' + "'-APPCONTAINER:NO -MACHINE:${Target} -DEBUG" +
+            $(if ( $Configuration -match '(Release|RelWithDebInfo|MinSizeRel)' ) { ' -OPT:REF -OPT:ICF -LTCG -INCREMENTAL:NO' }) + "'")
         $(if ( $Target -eq 'arm64' ) { '--as=armasm64.exe','--cpu=armv8' })
         '--pkg-config=pkg-config'
         $(if ( $Target -ne 'x86' ) { '--target-os=win64' } else { '--target-os=win32' })