patch 9.1.1602: filetype: requirements-*.txt files are not recognized

Problem:  filetype: requirements-*.txt files are not recognized
Solution: Detect requirements-*.txt files as requirements filetype
          (Xudong Zheng).

References:
- https://github.com/search?q=path%3Arequirements-*.txt&type=code
- https://github.com/zephyrproject-rtos/zephyr/tree/v4.2.0/scripts

closes: #17894

Signed-off-by: Xudong Zheng <7pkvm5aw@slicealias.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: xudongzheng

runtime/filetype.vim

@@ -1945,6 +1945,7 @@ au BufNewFile,BufRead .pinerc,pinerc,.pinercex,pinercex		setf pine
 au BufNewFile,BufRead *.pip			setf requirements
 au BufNewFile,BufRead requirements.txt		setf requirements
 au BufNewFile,BufRead *-requirements.txt	setf requirements
+au BufNewFile,BufRead requirements-*.txt	setf requirements
 au BufNewFile,BufRead constraints.txt		setf requirements
 au BufNewFile,BufRead requirements.in		setf requirements
 au BufNewFile,BufRead requirements/*.txt	setf requirements

src/testdir/test_filetype.vim

@@ -662,7 +662,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     readline: ['.inputrc', 'inputrc'],
     rego: ['file.rego'],
     remind: ['.reminders', 'file.remind', 'file.rem', '.reminders-file'],
-    requirements: ['file.pip', 'requirements.txt', 'dev-requirements.txt', 'constraints.txt', 'requirements.in', 'requirements/dev.txt', 'requires/dev.txt'],
+    requirements: ['file.pip', 'requirements.txt', 'dev-requirements.txt', 'requirements-dev.txt', 'constraints.txt', 'requirements.in', 'requirements/dev.txt', 'requires/dev.txt'],
     rescript: ['file.res', 'file.resi'],
     resolv: ['resolv.conf'],
     reva: ['file.frt'],

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1602,
 /**/
     1601,
 /**/