Update src/Search/Linear/LinearSearch.java

If A was a vector of 1.000.000.000 elements, for each i in the for syntax, java will calculate the length of 1.000.000.000 for 1.000.000.000 times.
Update src/Search/Linear/LinearSearch.java
Merge pull request #1 from sarbull/patch-1

Update src/Search/Linear/LinearSearch.java