Feat(linux): Add new process flags

`PF_BLOCK_TS` and `PF_SUSPEND_TASK`.

They are also added to the tests. Interestingly, `PF_SUSPEND_TASK` is
already there somewhere in the build script 🤔

Signed-off-by: Paul Mabileau <paul.mabileau@harfanglab.fr>

(backport <#4174>)
(cherry picked from commit 6934e52)

Author: PaulDance

libc-test/build.rs

@@ -2062,9 +2062,9 @@ fn test_android(target: &str) {
             | "PF_IO_WORKER"
             | "PF_WQ_WORKER"
             | "PF_FORKNOEXEC"
+            | "PF_MCE_PROCESS"
             | "PF_SUPERPRIV"
             | "PF_DUMPCORE"
-            | "PF_MCE_PROCESS"
             | "PF_SIGNALED"
             | "PF_MEMALLOC"
             | "PF_NPROC_EXCEEDED"
@@ -2080,6 +2080,7 @@ fn test_android(target: &str) {
             | "PF_NO_SETAFFINITY"
             | "PF_MCE_EARLY"
             | "PF_MEMALLOC_PIN"
+            | "PF_BLOCK_TS"
             | "PF_SUSPEND_TASK" => true,
 
             _ => false,
@@ -4315,7 +4316,9 @@ fn test_linux(target: &str) {
             | "PF_RANDOMIZE"
             | "PF_NO_SETAFFINITY"
             | "PF_MCE_EARLY"
-            | "PF_MEMALLOC_PIN" => true,
+            | "PF_MEMALLOC_PIN"
+            | "PF_BLOCK_TS"
+            | "PF_SUSPEND_TASK" => true,
 
             // FIXME: Requires >= 6.9 kernel headers.
             "EPIOCSPARAMS"

src/unix/linux_like/linux/mod.rs

@@ -5656,6 +5656,14 @@ pub const PF_RANDOMIZE: c_int = 0x00400000;
 pub const PF_NO_SETAFFINITY: c_int = 0x04000000;
 pub const PF_MCE_EARLY: c_int = 0x08000000;
 pub const PF_MEMALLOC_PIN: c_int = 0x10000000;
+pub const PF_BLOCK_TS: c_int = 0x20000000;
+pub const PF_SUSPEND_TASK: c_int = PF_SUSPEND_TASK_UINT as _;
+// The used value is the highest possible bit fitting on 32 bits, so directly
+// defining it as a signed integer causes the compiler to report an overflow.
+// Use instead a private intermediary that assuringly has the correct type and
+// cast it where necessary to the wanted final type, which preserves the
+// desired information as-is in terms of integer representation.
+const PF_SUSPEND_TASK_UINT: c_uint = 0x80000000;
 
 pub const CSIGNAL: c_int = 0x000000ff;