python3.10: patch set re-work. (#10750)

Re-worked the patchset, mostly to avoid having scattered changes to the same
areas, trying to keep each "commit" on a narrower focus/topic.

Fixes #10211, and attempts to fix some remaining _INSTALL_SCHEMES issues.
(makes `platinclude` point to the system headers for the default scheme,
which should avoid having to set HAIKU_USE_VENDOR_DIRECTORIES=1 when bulding
gdb).

dev-lang/python/python3.10-3.10.14.recipe

@@ -11,7 +11,7 @@ OSI-approved open source license."
 HOMEPAGE="https://www.python.org"
 LICENSE="Python"
 COPYRIGHT="1990-2024 Python Software Foundation"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://www.python.org/ftp/python/$portVersion/Python-$portVersion.tar.xz"
 CHECKSUM_SHA256="9c50481faa8c2832329ba0fc8868d0a606a680fc4f60ec48d26ce8e076751fda"
 SOURCE_DIR="Python-$portVersion"
@@ -116,7 +116,7 @@ BUILD()
 	# "compiler flags are generated in two sets, BASECFLAGS and OPT.  OPT is just
 	# for debug/optimization stuff.  BASECFLAGS is for flags that are required
 	# just to get things to compile and link."
-	export BASECFLAGS="-D_BSD_SOURCE"
+	export BASECFLAGS="-pipe -D_BSD_SOURCE"
 
 	# Not exporting OPT ends up with "-g -fwrapv -O3 -Wall" being used,
 	# and using OPT="" means the build ends up being "-O0".
@@ -206,9 +206,7 @@ INSTALL()
 # Problem is "os.getcwd()" will return wrong data, causing some file operations to fail.
 
 # For reference... Tests results on beta4 (x64):
-# 25 test ommited. 320 tests OK. 24 tests failed. 27 tests skipped.
-# On verbose re-run stage:
-# 25 test ommited. 323 tests OK. 21 tests failed. 27 tests skipped.
+# 345 tests OK. 23 tests failed. 28 tests skipped.
 TEST()
 {
 	# Remove tests data left-overs, if any