debian: fix dbgsrc path #267

Job	Run time
coverage - measure	1m 33s
sanitizer - debian:trixie	1m 17s
sanitizer - arm32v7/debian:trixie	1m 59s
sanitizer - arm64v8/debian:trixie	1m 52s
linux - arm32v7/debian:bookworm	1m 56s
linux - debian:bookworm	1m 26s
linux - arm64v8/debian:trixie	2m 1s
linux - debian:trixie	1m 24s
linux - arm64v8/debian:bookworm	1m 45s
vcpkg - windows	2m 18s
ios	1m 16s
linux - ubuntu:noble	1m 33s
linux - arm32v7/debian:trixie	2m 9s
conan - macos-latest	1m 58s
msys2 - mingw32	2m 11s
lint	1m 35s
macosx	1m 57s
android	3m 24s
msys2 - mingw64	2m 3s
msvs	1m 0s
vcpkg - linux \|	1m 52s
conan - linux \|	1m 48s
conan - emscripten \|	1m 55s
	42m 12s

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