i#6761: Fix tool.drcov.eintr expected output (#6762)

Allows either a covered or not-covered verdict for lines that may or may
not be executed depending on where signals are delivered in the test
app.

It is better to adapt the expected output template than to modify the
test code because there's nothing really wrong with the test code (no
race since it already uses locks where required).

Fixes: #6761

suite/tests/linux/tool.drcov.eintr.template → suite/tests/linux/tool.drcov.eintr.templatex

@@ -30,7 +30,7 @@ DA:99,0
 DA:100,0
 DA:103,1
 DA:104,1
-DA:105,1
+DA:105,[01]
 DA:106,1
 DA:107,1
 DA:114,1
@@ -40,7 +40,7 @@ DA:121,1
 DA:122,1
 DA:124,1
 DA:125,1
-DA:126,1
+DA:126,[01]
 DA:127,1
 DA:128,1
 DA:130,1