treewide: auto-convert the simple cases to log_*_errno()

As a followup to 086891e5c1 "log: add an "error" parameter to all
low-level logging calls and intrdouce log_error_errno() as log calls
that take error numbers", use sed to convert the simple cases to use
the new macros:

find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/'

Multi-line log_*() invocations are not covered.
And we also should add log_unit_*_errno().

src/bootchart/bootchart.c

@@ -290,7 +290,7 @@ static void do_journal_append(char *file) {
         }
         n = loop_read(f, p + 10, BOOTCHART_MAX, false);
         if (n < 0) {
-                log_error("Failed to read bootchart data: %s", strerror(-n));
+                log_error_errno(-n, "Failed to read bootchart data: %m");
                 close(f);
                 return;
         }
@@ -302,7 +302,7 @@ static void do_journal_append(char *file) {
 
         r = sd_journal_sendv(iovec, j);
         if (r < 0)
-                log_error("Failed to send bootchart: %s", strerror(-r));
+                log_error_errno(-r, "Failed to send bootchart: %m");
 }
 
 int main(int argc, char *argv[]) {