POSIX: move getentropy(2) from libbsd

Specified in POSIX.1-2024
https://www.austingroupbugs.net/view.php?id=1134
Change-Id: Ie715a102aa6f7764bc639e0a1874a6c7f7d81019
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7846
Reviewed-by: waddlesplash <[email protected]>

headers/compatibility/bsd/unistd.h

@@ -28,8 +28,6 @@ char	*getusershell(void);
 int		issetugid(void);
 void	setusershell(void);
 
-int		getentropy(void *buf, size_t buflen);
-
 #ifdef __cplusplus
 }
 #endif

headers/posix/unistd.h

@@ -481,6 +481,8 @@ extern void 	encrypt(char block[64], int edflag);
 extern int		getopt(int argc, char *const *argv, const char *shortOpts);
 extern void 	swab(const void *src, void *dest, ssize_t nbytes);
 
+int				getentropy(void *buf, size_t buflen);
+
 /* getopt() related external variables */
 extern char *optarg;
 extern int optind, opterr, optopt;

src/libs/bsd/Jamfile

@@ -19,7 +19,6 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			explicit_bzero.c
 			fgetln.c
 			fts.c
-			getentropy.c
 			getpass.c
 			issetugid.c
 			kqueue.cpp

src/system/libroot/posix/unistd/Jamfile

@@ -22,6 +22,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			exec.cpp
 			_exit.c
 			fork.c
+			getentropy.c
 			getlogin.cpp
 			getpagesize.c
 			hostname.cpp